Fresenius Medical Care 2008T Operator's Manual page 277

Glossary
BVM (Blood Volume Monitor)—This is an optional module that can measure the relative fraction of
blood cells within the circulating fluid. It can be used to estimate how the machine's ultrafiltration rate
relates the fluid refilling rate from the extra-cellular compartments. If ultrafiltration rate is excessive
compared to the refilling rate, a hypotensive event is more likely.
Bypass Mode—Bypass mode occurs when the dialysate goes outside alarm limits for temperature or
conductivity. In bypass mode, valves inside the 2008T hemodialysis machine redirect the flow of
dialysate to bypass the dialyzer internally until temperature and conductivity are back within acceptable
limits. The 2008T hemodialysis machine can be manually put into bypass mode by lifting the shunt door.
Compliance Chamber—A blood-holding receptacle similar to a drip chamber. Compliance chambers
are part of the arterial bloodline used in single-needle dialysis.
Conc—Abbreviation for "concentrate."
CLiC Device—Abbreviation for "Crit-Line in a Clip." See Crit-Line in a Clip for more information.
Crit-Line in a Clip—The Crit-Line in a Clip (CLiC) device is used to non-invasively measure a
hemodialysis patient's hematocrit, oxygen saturation and percent change in blood volume. These
measurements occur in real time in order to provide a more effective treatment. The measurements are
displayed on the 2008T hemodialysis machine's "Crit-Line" screen. Under the direction of a physician,
the clinician/nurse can increase or decrease the ultrafiltration (UF) rate in order to remove the maximum
amount of fluid without the patient experiencing the common dialysis related complications which
include hypotension, nausea, cramping and vomiting.
The system consists of software for the 2008T hemodialysis machine, a Crit-Line in a Clip (CLiC)
device, a CLiC device-specific verification filter which is used to calibrate and verify the CLiC device,
and a disposable Crit-Line Blood Chamber.
Dialysate—Aqueous fluid containing electrolytes and usually buffer and glucose, which is intended to
exchange solutes with blood during hemodialysis. This is the Final Dialysate, See Final Dialysate for
more information.
DIASAFE Plus filter—A filter that is placed in the dialysate fluid path after the addition of the acid and
bicarbonate concentrates, shortly before the dialysate is delivered to the dialyzer. It substantially reduces
the level of bacteria and endotoxin (pyrogenic material) in the dialysate.
eKt/V—Equilibrated Kt/V or double pool Kt/V. This accounts for rebound of urea after the treatment is
stopped. The shorter the treatment time, the greater the percentage difference between spKt/V and eKt/V.
We use the Tattersall formula to calculate eKt/V.
Fill Program—Occurs when water level in the air separation chamber gets too low. The air separation
chamber is part of the hydraulic system inside the 2008T hemodialysis machine. This program is used to
remove excessive air from the hydraulic system. The machine will normally go into a Fill program when
the dialyzer is first connected to the dialyzer lines, and the air within the dialyzer is being purged.
Repeated Fill programs during operation, however, could indicate a leak in the dialysate delivery system,
and should be brought to the attention of a qualified technician.
Final Dialysate—The prescribed dialysate that is delivered to the dialyzer (patient) by the hemodialysis
machine after the proportioning (mixing) of the acid concentrate, bicarbonate concentrate, and water. The
final dialysate may also be referred to as the post-reaction dialysate (i.e. after proportioning (mixing) of
the acid concentrate, bicarbonate concentrate and water by the dialysis machine).
2008T Machine Operator's Manual P/N 490122 Rev N 277